LUGB Compressed Air Vortex Flow Meter

LUGB Vortex flow meter ,compressed air flow meter

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Model	LUGB-N	LUGB-A	LUGB-B	LUGB-C	LUGB-D1/D2
Signal Output	Pulse	4-20mA	N/A	4-20mA	Optional: 4-20mA/Pulse
Power Supply	24VDC±15%	24VDC±15%	Lithium Battery	24VDC±15%	24VDC±15%
Communication	N/A	N/A	N/A	Optional: RS485	Optional: RS485
Accuracy	Liquid: 1.0% Gas: 1.0% Steam: 1.5%
Local Display	None		Yes		Yes  temperature and pressure compensation
Housing Material	SS304
Explosion Proof	Optional: ExiaIICT5 or ExdIIBT6
Protection Level	IP65
Diameter	DN15 to DN300
End Connection	Flange or Wafer
Pressure Rating	Standard: 1.6 MPa; Optional: 2.5MPa
Fluid Temperature	1. Standard: -40℃~250℃; 2. High Temperature: -40℃~350℃
Ambient Temperature	-20℃~60℃

Working Principle 

Non-streamline vortex-maker be set in fluid(anti-flow part),then two regular vortex would be come out ,from two sides of the vortex-maker in turn,so this kind of vortex be called as Karman vortex street,Chart I as follow.

                                chart I

Vortex is not flowing symmetrically under vortex-maker set .As if, set frequency of vortex is f,the speed of test medium is V,inlet face width of vortex-maker is d,Past part diameter is D,as the principle of Karman vortex street ,as follow:

                         f=StV/d                 I

Factor:

f-The Karman vortex street frequency which one side of vortex-maker

St-Strouhal number(dimensionless number)

V-mean flow rate

d-the width of vortex-maker

So, check the separate frequency of Karman vortex street to know the instant capacity(flow) .among, Strouhal number(St)is dimensionless number,

Chart II   Show the relation of, Strouhal number(St) & Reynolds number (Re)

Straightness part in curve(St=0.17),free frequency & flow rate of vortex is direct ratio, it means flow sensor range. so just check out frequency (f),we can get the flow rate inside pipe, then as the flow rate(V) to take volume flow, the ratio record of impulse & volume, called as(K),as follow(2)

                       K=N/Q(1/m³)             (2)

Model:K=instrument constant(1/m³).

N=impulse number

Q=volume flow(m³)

Pioneer Instrument is an ISO9001 quality certified company specializing in the design and manufacture of a proprietary range of Gas turbine flowmeter, liquid turbine (impeller) flowmeter, vortex flowmeter, magnetic flowmeter and dedicated electronic flow instrumentation. Moreover, We agenting Germany brand KROHNE flow meter .

The meters measure the flow of clean liquids and are produced in a wide variety of materials and configurations to suit most markets including the food, chemical, cosmetic, ink, pharmaceutical, paint, petroleum and additive industries. Now the sanitary instruments include sanitary turbine flowmeter, sanitary magnetic flowmeter and sanitary temperature & pressure sensors.